JQuery Ajax POST in Codeigniter

$(document).ready(function(){       $("#send").click(function()    {            $.ajax({         type: "POST",         url: base_url + "chat/post_action",          data: {textbox: $("#textbox").val()},         dataType: "text",           cache:false,         success:               function(data){                alert(data);  //as a debugging message.              }          });// you have missed this bracket     return false; }); });

In codeigniter there is no need to sennd "data" in ajax post method..here is the example .

   searchThis = 'This text will be search';    $.ajax({      type: "POST",      url: "<?php echo site_url();?>/software/search/"+searchThis,      dataType: "html",      success:function(data){        alert(data);      },    });

Note : in url , software is the controller name , search is the function name and searchThis is the variable that i m sending.

Here is the controller.

    public function search(){    $search = $this->uri->segment(3);      echo '<p>'.$search.'</p>';    }

I hope you can get idea for your work .

    <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');    class UserController extends CI_Controller {        public function verifyUser()    {            $userName =  $_POST['userName'];            $userPassword =  $_POST['userPassword'];            $status = array("STATUS"=>"false");            if($userName=='admin' && $userPassword=='admin'){                $status = array("STATUS"=>"true");              }            echo json_encode ($status) ;            }    }function makeAjaxCall(){    $.ajax({        type: "post",        url: "http://localhost/CodeIgnitorTutorial/index.php/usercontroller/verifyUser",        cache: false,                       data: $('#userForm').serialize(),        success: function(json){                                try{                    var obj = jQuery.parseJSON(json);            alert( obj['STATUS']);        }catch(e) {                 alert('Exception while request..');        }               },        error: function(){                                  alert('Error while request..');        } });}